Crank operator dual arm

This window operator is a match for either the 39-253LB or the 39-438B. These use either the 39-375 (folding) or 39-451 cover and handle kits.

To determine which of these is the correct replacement, you'll need to compare the attachments at the end of the arm. Take a look at the tutorial below for a detailed explanation on the difference between the two operators.

The other compatible hardware and accessories can be found in the related products for each operator.